21009840

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{87541}}^1$

素因数の和:87557

約数の個数: 40

約数和(自身を含む): 65131248

約数和(自身を除く): 44121408

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 240, 87541, 175082, 262623, 350164, 437705, 525246, 700328, 875410, 1050492, 1313115, 1400656, 1750820, 2100984, 2626230, 3501640, 4201968, 5252460, 7003280, 10504920, 21009840]

約数ペア:

[(1, 21009840), (2, 10504920), (3, 7003280), (4, 5252460), (5, 4201968), (6, 3501640), (8, 2626230), (10, 2100984), (12, 1750820), (15, 1400656), (16, 1313115), (20, 1050492), (24, 875410), (30, 700328), (40, 525246), (48, 437705), (60, 350164), (80, 262623), (120, 175082), (240, 87541)]